London Calling at the Pole Farm

On any given summer day, an 800-acre expanse of grasslands and forested tract on Lawrence Township’s Cold Soil Road is alive with buzzing insects and chirping birds. Ninety years ago the tract was alive with state-of-the-art radio technology that transmitted telephone calls to Europe, South America and the Caribbean. 

Locals dubbed it the Pole Farm for the ever-increasing number of oversized telephone poles that sprouted up to meet increasing demand for international telecommunications service. Today the poles are gone and the site is part of Mercer Meadows, a unit of the Mercer County Park System.

The Pole Farm’s quaint appellation belies the magnitude of its stature as the American Telephone and Telegraph Company's Long Lines Overseas Telephone Radio Transmitting Station. More than two dozen steel towers, and then hundreds of towering poles were erected between 1929 and the 1960s to support antennae that transmitted telephone calls via shortwave radio to points across the Atlantic.

These days, we take international telephone service for granted; with the advent of web-based services, many of us skip the phone for video anyway. In the early 20^th century, however, telecommunication was limited to places that had been physically wired into the system. Thus, North America could talk to North America, and Europe could talk to Europe, but there was no way for people in the Eastern Hemisphere to talk with those in the Western Hemisphere.

Enter the wonders of radio, which was becoming commercially viable for voice signals in the early 1920s. Bell Labs engineers first devised a way to transmit converted phone signals to London and back via long-wave radio signals, but that was on an expensive single circuit. If AT&T had any hope of selling international telephone service to the public, it had to be both cost effective and available on demand.

The answer came in shortwave radio, which overcame the issues of long-wave but brought its own limitations. (Big science alert here!) To beam powerful signals long distances, specialized radio antennas would have to be located precisely, built under exacting conditions and suspended by large arrays of towers. Bell Labs engineers again got to work, determining what kind of equipment the service would need and where it would need to be located to operate optimally. Their solution also had to address the very real problem that the wavelengths of shortwave vary in how well they work, depending on the time of day. If the service were to be reliable, engineers would have to overcome the limitation with a better antenna.

Beyond the knotty radio transmission challenges, AT&T needed two pieces of land - one to build a transmitter and another to build a receiver - far enough away from each other to assure that the arriving and departing signals didn't interfere with each other. Building them in sparsely populated areas would assure that there wouldn't be much if any other radio traffic to interfere. The transmitting station needed to be relatively close to U.S. Route 1, where the primary East Coast telephone system trunk line was located.

Netcong in hilly, rural western Morris County proved to be a suitable location for the receiving station, narrowing the possibilities for a transmitting station to the south. Lawrence and Hopewell Townships proved to be just the spot, with appropriately level farmland that was largely cleared. AT&T’s land acquisition team quietly began negotiating with 14 farmers in 1928, moving quickly in the hopes that deals would close before local chatter would prompt property owners to raise their prices. Word got out in the local newspaper, and while AT&T initially denied being in the market for farmland, it eventually admitted the transactions and closed the deals.

Following the purchases, AT&T quickly got to work on the infrastructure, both here in New Jersey and the first two international locations, London and Buenos Aires.

The Lawrence Township facility included two radio transmission buildings complete with an innovative water cooling system for the powerful vacuum tubes that generated the necessary shortwaves. To the outside world, the most remarkable feature of the facility was the v-shaped configuration of 180-foot-high steel towers – 26 in all – which supported a series of wire-mesh antennas. Placed about 250 feet apart, the lines of towers extended about a mile in each direction, aimed to beam signals to London and Buenos Aires. Somewhat like shades that could be rolled up and down, the mesh curtain antennas were precisely tuned to accommodate the complexities of shortwave technology at a given time of day or night. Machinery hoisted the various curtains on Roebling cable at the appointed hours to ensure reliable telephone service 24 hours a day.

Work was completed in Lawrence and London in 1929, right on schedule, with Buenos Aires coming online in 1930. Technological advancements soon improved efficiency and capacity, enabling the site to handle more calls on a single radio channel and bringing the cost of a call to $30 for three minutes. Meanwhile, some of the farmers who once owned the land had made deals to lease it back, and continued to raise crops in the shadows of the towers. One could say the property was bearing fruit for everyone.

An example of the layout of a single rhomboid antenna,
illustrated on the Pole Farm's concrete map. 

Just three years after the massive towers were erected, AT&T introduced the rhombic antenna – a five acre-wide diamond-shaped array of eight poles, each 80 feet high, holding up the antenna wire. These smaller, less expensive arrays spelled the end for the giant curtain antennae, which were dismantled in 1939. Further advancements brought the twin rhombic antenna (think one diamond next to another). It’s the proliferation of those, over time, that led locals to dub the tract the Pole Farm. With farming still going on around and amid the antennae, it probably didn’t take much imagination for an onlooker to conclude that the tract’s big crop was oversized telephone poles.

By the mid 1950’s, the site was the largest facility of its type in the world, handling more than a million calls a year. The site’s remaining woodlots and orchards were cleared to erect even more antennas, totaling more than 2000 poles by the 1960s. Old farmhouses, previously converted to housing for AT&T workers, were either moved offsite or demolished to create more space.

In the end, the technological progress that had given birth to the Pole Farm was what ultimately what created its demise. The successful introduction of transatlantic telephone cables and then satellite telecommunication proved to offer more reliable, less costly service. AT&T relegated the Pole Farm to backup status in the 1960s, removing antennae as they were taken out of service. In the final years, the facility that once provided groundbreaking voice communications to world capitals was now left to serve small markets in countries most Americans couldn’t easily locate on a map.

AT&T fully decommissioned the Lawrence Overseas Telephone Radio Transmitting Station on December 31, 1975. By the end of 1977, virtually every standing structure on the Pole Farm had been demolished – everything but a single pole from the Tel Aviv rhombic. Farmer Charlie Bryan had requested that it remain standing as a lightning rod to protect his home and barn nearby.

Other traces of the Pole Farm’s infrastructure are largely gone, through you might find the stray cable or concrete footing among the ground foliage as you stroll along the wooded paths. The county has memorialized the two transmitter buildings with steel arches that approximate where their entrances would have been. The site of Building Two, not far from the parking lot, includes a large concrete map of the antenna configurations that once stood on the grounds. One can walk from Bogota to Berlin, to Moscow, to London, to Willemstad, to Bermuda, imagining the conversations that flowed through those radio waves.

Turns out, too, that the Pole Farm is a remarkably lovely place to visit on a summer afternoon. In the two decades since Mercer County bought the property, 435 acres of the former farmland has been converted to native grasslands. It’s great habitat for Short-eared Owls and Harriers in winter, and Grasshopper Sparrow, Bobolink and Meadowlark in summer. The Washington Crossing Audubon has pegged the fields as outstanding for butterflies if the county leaves the grasses and wildflowers unmowed for the summer.

Level gravel paths make the entire place very welcoming to anyone on foot, bicycle, stroller or wheelchair. As you walk or roll or run, consider that some of the very routes you’re taking are the service roads that linemen once used as they maintained the antennae that connected the world’s voices. Stop to look closely in the woods, and you might even see vestiges of the poles, guy lines and concrete footings that stabilized the antennae. Interpretive signage along the paths offer photos of the structures that once stood there, along with portraits of some of the people who kept the station humming. A leisurely visit will leave you marveling at what once stood there.

While I’ve covered a lot, there’s so much more to the Pole Farm, from nature to history to technology. Lawrence Township historian Dennis Waters’ very informative presentation for the Mercer County Park Commission, available on YouTube, dives a bit deeper into the technology, the people who worked at the site, and the post AT&T history. It’s definitely worth watching.

Inclined to love the Morris Canal: technology and archaeology at the Jim and Mary Lee Museum

It's not often my mind gets blown on a Hidden New Jersey jaunt. We see a lot of wonderful things and meet many interesting people in our travels, but it's rare that a visit to one place gets me so excited that I don't know where to start the story. This is one of those instances.

It started a couple of weeks ago, when I traveled Route 57 through Warren County to find remnants of the old Morris Canal. Once-busy port towns revealed small pieces of their past, while a wrong turn outside of Montana brought me to a lonely stretch of the canal hidden in the woods of Scott's Mountain. As interesting as it all was, something was missing: the actual mechanical workings of the canal. Without that, you're just looking at a series of long ditches. Yeah, they're historical, but they show no indication of why the Morris Canal was such a big deal.

And it was a big deal, and still is now, 90 years after it went out of business. You see, to traverse its 102 mile run across north-central New Jersey, the Morris Canal had to surmount a total altitude change of 1674 feet (760 feet up from Phillipsburg to Lake Hopatcong, and then down 914 feet from the Lake to Jersey City). Canals generally use locks to float watercraft to a higher altitude or down to a lower one, as the Delaware and Raritan Canal did to overcome its 55 foot altitude change.

Having to manage a lot of height in a relatively short range, the engineers designing the Morris had to come up with something much different. Sure, they built locks to handle the smaller elevation rises, but the really pronounced peaks and valleys were addressed with a system of inclined planes that made the Morris a technological marvel for its time.

Plane 9W is just 4.5 miles from the canal's start in Phillipsburg.

The inclined plane is essentially a big ramp with machinery that pulls the canal boat up or down a ramp and deposits it back in the canal at the other end. To start, the boat would be floated onto a cradle car that acted as a little train, hauled on tracks by steel cable wound through a pulley system. The whole thing was powered by water shunted from the canal, through an elevated flume, into a powerhouse and down a 47-foot tall chute to a large turbine. Leaving by way of an underground tail race, the water would be returned to the canal, so nothing was lost.

Each inclined plane (and there were 23 of them over the route of the canal) did the work of the many locks that would be needed to make up for that degree of altitude change. The vast majority are gone now, some having been paved over as roads like Plane Street in Boonton.

Plane 9W's reaction-type or "Scotch" turbine was designated
a National Historic Mechanical Engineering Landmark in 1979.

The technology would have been left for history texts had it not been for a man named Jim Lee. Just after World War II, he bought the Stewartsville property on which plane 9W had stood, including the plane tender's house and remnants of the sleeper stones and cable which had been part of the site's apparatus. While the 100 foot tall incline was still there, the wooden flume and powerhouse had been demolished by the State, and much of the debris was tossed into the underground shafts, burying the turbine.

Jim, his family and friends set to work excavating the workings over the course of many years, clearing out the turbine chamber and finding scores of artifacts. In the process, Jim became the foremost expert on the Morris Canal, welcoming visitors to check out the old plane and turbine room. Though he died in 2007, his family continues to share the story on the property, which is now a Warren County park. They make special arrangements for school groups and the like, but it's open to the general public only seven times a year, on the second Sunday of the month, from April to October.

The 5.5 foot circumference tailrace took water from the turbine
back out to the canal at the lower end of the plane.

There's so much that makes the site cool that I barely know where to start. First off, it's absolutely mind blowing to consider the love and dedication behind Jim's work to unearth and share the story of Plane 9W and the Morris Canal. It's a huge testament to what a motivated history lover can do if he or she puts energy and persistence into gear. For someone to rescue a historic site on his own initiative, and then open it to others -- well, that takes a special person.

Next, there's the interpretation of the site. We were fortunate to get a tour from Jim's grandson, Jim Lee III, who's an industrial archaeologist when he's not educating people about the canal. First sharing the history and rationale for building the canal (a story for a future Hidden New Jersey entry), he led us through the technology behind the inclined plane in a way that revealed the ingenuity behind the designers' solution to a tough problem. Even if you're mechanically challenged, you'll come away with a clear understanding and a huge respect for the canal's builders.

A portion of the steel tow cable.

And finally, there's the ground you cover during the tour. Jim brought us through the stone-lined tailrace tunnel to see the turbine underground that powered the plane's tow rope, and then to the top of the plane to inspect the sleeper stones that once acted as a bed for the cradle car rails. Remnants of the steel tow cable snake through the grass, rusted but still looking very strong. At every stop along the way, Jim gave us insights about life on the canal and its impact on the communities it traveled through.

The last stop on the tour is the Jim and Mary Lee Museum, a room within the plane tender's house. While plenty of artifacts and photos are on display, I have to say my favorite was the conch that once belonged to Mary Lee's grandfather, who was one of her many relatives to work on the canal. Sea snail shells may seem out of place in western New Jersey, but they were a common sight along the Morris. Barge crew would sound the conch's trombone-like note to alert lock and plane tenders of their imminent arrival. As Jim demonstrated, they make quite a commanding sound when you blow into one end.

As an appreciator of all things innovative in New Jersey, I found it heartening to see how many people stopped by to visit Plane 9 and the museum during the hour or so that we were there. Such an important site, interpreted so well, deserves a large audience. If you'd like to visit or arrange a tour for a group, check out the Morris Canal website for more information.

Bang, zoom, straight to the moon, Diana!

If there was intelligent life on the moon, the first call it would have gotten was from New Jersey. Wall Township, specifically.

More accurately, the call was a microwave radio signal, and rather than expecting a message back, scientists were trying to create what became known as moon bounce, or earth-moon-earth (EME) communications.

The Diana antenna, made from four
existing conventional radar antennas.

Known as Project Diana, this classified work was based at Fort Monmouth's Evans Signal labs, birthplace of dozens of 20th century technological advancements. Its urgency was driven by the success of the revolutionary German V1 and V2 guided missiles during World War II. After the United States proved the effectiveness of nuclear weapons in 1945, the fear was that the USSR would combine the two technologies with disastrous results. We clearly needed a way to identify and track the missiles before they entered U.S. airspace.

Colonel John DeWitt and his Camp Evans-based team were charged with the task in the closing months of the war. Before they could work on detection, however, they had to prove that a radio signal could pierce the earth's atmosphere as the V1 and V2 could. A few years earlier, a British communications scientist had theorized that existing technology would be capable of bouncing microwave signals off the moon which, at 238,900 miles away, would serve as an ideal target.

In September 1945, Evans Signal Labs personnel got to work designing and building the necessary equipment: a sufficiently powerful transmitter and receiver along with an antenna array to capture the return signal. (If you're an engineer, astronomer or physicist, you might enjoy reading a more technical description and schematics written by one of the participants.) Three months later, their initial tests were hampered by a series of malfunctions and outright equipment failures.

A new year and heavily redesigned equipment brought better results. At moonrise on January 10, 1946, they succeeded, receiving a return signal 2.5 seconds after transmission. It took some time to determine the right conditions to repeat the achievement, but Evans professionals had made theory a reality.

The first experiment in radio astronomy, Project Diana's impact reached far beyond national defense. Many consider that first successful radio bounce to be the true birth of the space program. Had scientists not proven that human-created radio signals could leave our atmosphere, people on Earth would not have be able to communicate with astronauts in orbit or on the moon. Skylab and the International Space Station would have been pipe dreams. Nor would we have been able to receive signals from long-distance spacecraft like Voyager I and II, which have been returning information to us by radio since their launches in 1977.

And, of course, this experiment on The Big Bang Theory would have been totally impossible.

The original Diana antenna no longer exists, but a support building remains at Camp Evans, now the site of the InfoAge Science History Learning Center and Museum. As we discovered during our visit last July, the expansive yet utilitarian-looking property holds a wealth and breadth of history well worth exploring.